ISSUE: Operating the radar in Ground Map Mode with a selected range of 10 nm or less can permanently damage the power amplifier in the GWX 70, which will result in a loss of all weather radar system functions.

PILOT ACTION: Do not select radar range settings of 10 nm or less while the GWX 70 is operating in Ground Map Mode. Weather Mode operations are not affected and may be used with any range setting.

RESOLUTION: A future GWX 70 software update will be released to address the issue.